| 单词 | indigo-sulphate |
| 释义 | > as lemmasindigo-sulphate indigo-sulphate n. (also sulphate of indigo) see quots. Π 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) II. 906 The compounds [of indigo-sulphuric or sulphindigotic acid] are called indigo-sulphates, and are, like the acid, of a dark blue colour... The indigo-sulphates of the alkalis may..be prepared by steeping wool, previously well cleaned, into the solution in sulphuric acid. < as lemmas |
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